74593993 has 4 divisors (see below), whose sum is σ = 74884500. Its totient is φ = 74303488.

The previous prime is 74593973. The next prime is 74594017. The reversal of 74593993 is 39939547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71014329 + 3579664 = 8427^2 + 1892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74593993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74593903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144868 + ... + 145381.

It is an arithmetic number, because the mean of its divisors is an integer number (18721125).

Almost surely, 2^74593993 is an apocalyptic number.

It is an amenable number.

74593993 is a deficient number, since it is larger than the sum of its proper divisors (290507).

74593993 is a wasteful number, since it uses less digits than its factorization.

74593993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290506.

The product of its digits is 918540, while the sum is 49.

The square root of 74593993 is about 8636.7814028144. The cubic root of 74593993 is about 420.9539785285.

The spelling of 74593993 in words is "seventy-four million, five hundred ninety-three thousand, nine hundred ninety-three".